CRT SS 7900 User manual

USER MANUAL
10 Meter Amateur Radio
CopyrightCRT France 2015

and EN 62311.

CONTENTS
FUNCTIONS & FEATURES..................................................................1
STANDARD ACCESSORIES................................................................2
INSTALLATION.....................................................................................2
GETTING ACQUAINTED......................................................................5
HOW TO USE YOUR RADIO ...............................................................7
KEYPAD FUNCTION ............................................................................9
BACKGROUND FUNCTION MENU OPERATION.............................12
SPECIFICATIONS...............................................................................13

1
FUNCTIONS & FEATURES
Big LCD displays frequency and all kinds of information
◆
FM
◆ 、AM、USB、LSB、PA mode
Frequency Tuning Step 100Hz
◆ 、1KHz、10KHz、100KHz、1MHz
±1.5KHz CLARLFILER Adjustment
◆
Flexible Menu Function and PC Program Software
◆
ECHO Function
◆
SQ, ASQ Function (FM and AM mode only)
◆
RF GAIN Adjustment
◆
RF PWR Adjustment
◆
SCAN Function
◆
Programmable RB Function
◆
NB/ANL Function
◆
DW DUAL-WATCH Function
◆
Offset Frequency Function
◆
BEEP Voice Prompt
◆
+10KHZ Function
◆
SIG
◆ 、PWR、SWR Function
TOT function
◆
HI-CUT Function
◆
EMG Channel Function
◆
SWR Protection
◆
Power Supply Voltage Protection
◆
Key-Lock Function
◆
Six(6) Groups Memory Channel
◆
Model Name Customized Function
◆
CTCSS/DCS Code(included)
◆

2
STANDARD ACCESSORIES
INSTALLLATON
Radio
Screws for
bracket
Self-tapping
Screws
Microphone
Pads for
bracket
Adjusting
screws
Microphone
Hanger
Mounting Bracket Non-slip
Mat
Spare Fuses
(10A,250V)
Choose the most appropriate setting from a simple and
practical point of view. Your radio should not interfere
with the driver or crash the driver's knee or leg when
rush brake.
Microphone connection
Plug microphone connector into jack.1.
Pull on the screw for microphone connector.2.
Using the self-tapping screws and pads(2 sets) to x 1.
the bracket.
Put the Non-slip mat on the 2 ends of the bracket and put in the radio. Then insert2.
the adjusting screws and check careful each screws, make sure the screws and
machine will not loose when the car shaking.
Choose suitable angle by the 3 screw holes in the two ends of bracket.3.
power cord

3
ANTENNA INSTALLATION
POWER CONNECTION
Before using this radio, please install a high efficent and harmonious adjusted
CB antenna, suitable antenna type and correct installation will bring excellent
communication.
To match with the radio, the antenna and cable shall with characteristic impedance of
50ohm, or the antenna system will not efcient enough and will disturb TV, radio or other
electronics.
Screw the antenna connector into the antenna jack.1.
Grounding the antenna system to ensure best performance of this radio.2.
This radio adopt 13.8V power supply, never connect it to 24V battery, And the 13.8V car
battery shall with sufcient current, or the LCD will become dark and Transmit power
will drop down.
The position of antenna can be put as following example:3.
Connect positive red power cable with the + terminal of the battery.1.
Connect negative black power cable with the - terminal of the battery.2.
Connect the DC power cable to the transceiver's power supply connector.3.
▲ We suggest not use cigar lighter as it often bring down the voltage.
▲ Locate the power cable away from high temperature, moisture, portre and cable
insulator.
▲ Use a full power cable even it is longer than need, do not take off the fuse holder
from the cable.
Connected
to chassis
WARNING:
▲ Connect antenna rstly before transmiting, or it might damage the radio.
▲ To avoid the risk of fire, electric shock, radio damage, all base station shall
equip of lightning protector
▲ Be sure choose a matching antenna, you may enquiry our dealers.

4
Install Microphone Hanger
Install External Speaker
Choose a ideal location which will not interfere
the driver. Using supplied self-tapping screws and
pads(2 sets) to x the hanger.
If use an external speaker, please choose 8ohm speaker with 3.50mm mono band
(doulbe cable) plug.
Locate the external speaker in a suitable place.1.
Plug into the speaker jack.2.
Replacing Fuse
This radio adopt 10A, 250V fuse.
If the fuse blows, determine the reason, then correct the problem.
After the problem is resolved, replace the fuse. If newly installed fuses continue to
blow, disconnect the power cable and contact your autho-rized dealer or an authorized
servicecenter:
Pull the two fuse cover in difference direction and open it.1.
,
IN-LINE
FUSE HOLDER
Replace the broke fuse with good one, and close the fuse holder.2.
Be sure to use suggested fuse, or it might damage the radio.3.
FUSE
IN-LINE
FUSE HOLDER
IN-LINE
FUSE HOLDER
IN-LINE
FUSE HOLDER
10A 250V FUSE

5
GETTING ACQUAINTED
Front Panel
No. Key Functions
1 FRQ Switch between channel mode and frequency mode、offset
setup
2 BAND Switch band: A-I、ECHO setup
3 MENU Function Menu key
4 MODE Switch mode(FM、AM、USB、LSB、PA)、TSQ setup
5 DW Dual-watch scan、Frequency+10K function
6 RB RB function、Beep voice prompt function
7 NB NB function、HI-CUT function
8 SCAN Scan、Scan add、Scan delete
9 MEM Use, store or delete memory channel
10 EMG Emergency Channel; Keypad lock.
11 PWR RF Power Control
12 RFG RF Gain Control
13 SQ Squelch Control
14 CLAR SSB Clarier switch
15 VOL Power On/Off; Volume Control.
16 CH Channel Switch, Push key.
17 Microphone Jack
18 LCD Display
16
315 4 5 6 7 8 9 10
1
17
12 1411 13182

6
Microphone
Rear Panel
Channel Down Channel UP
Microphone cable
Mic
PTT
No. Functions
19 External SP Jack
20 External PA Jack
21 Antenna Jack
22 Power Supply Jack
22
19
20
21
PA.SP.
ANT.
POWER +
EXT.SP.
PTT button
RJ45 connector

7
LCD Display
1 RX Signal strength indicator.
2TX Signal strength indicator.
3SWR strength indicator.
4Model name Indicator.
5Appears when the Keypad lock function is ON.
6FUNC Appears when press MENU key.
7EMG Appears when using Emergency channel.
8Appears when adjust SSB clarier frequency.
9
AQ
Appears when use ASQ.
10
SC
Appears when scan function is ON.
11 Appears when modulation mode is ON.
12
CTC
Appears when set with CTCSS code.
13
DCS
Appears when set with DCS code.
14
HIC
Appears when Hi-cut function is ON.
15
BP
Appears when Beep voice is ON.
16
RB
Appears when RB function is ON.
17
REP
Appears when repeater function is ON.
18
DW
Appears when Dual-watch function is ON.
19
NB
Appears when adjust Noise Blanker is ON.
20
IOk
Appears when add 10k function is ON.
21
ECHO
Appears when Echo function is ON.
22 Working band indicator.
23 Appears when scan list is ON.
24 Display of frequency and channel.
6 5 187 11 13 1912 15
1098 23 14 17 16 20
2
122
24
21
3
4

8
RF Power Control
RF Gain Control
SQUELCH Control
SSB Clarier control
When the radio is transmitting, turn PWR outer shaft to adjust power. Turn it
clockwise to increase power, anti-clockwise to reduce power.
When the radio is receiving, turn RFG inner shaft to adjust RF gain. Turn it clockwise
to increase gain, anti-clockwise to reduce gain.
When the radio is standby, turn SQ outter shaft clockwise to adjust squelch level.
The LCD displays SQ: XX. (XX stands for the squelch level, total 1-36 levels).
When the radio is transmitting or receiving, turn CLAR inner shaft to adjust USB/
LSB TX or RX frequency. Turn it clockwise to increase frequency, anti-clockwise to
reduce frequency.
Channel Selection
When radio is in channel mode, turn channel knob to select desired channel.
Clockwise to increase, anti-clockwise to reduce channel.
Note: In channel display mode, each press【PUSH】key will increase the
frequency by 10 times of channel step size.
HOW TO USE YOUR RADIO
OFF/ON Radio
Turn VOL clockwise to switch on the radio, the radio emit a beep. When the LCD1.
displays frequency or channel, the radio is on.
Turn VOL anti-clockwise to switch off the radio, the radio is OFF when hear Ka2.
Ta from the switch.
Volume Control
When the radio is turned on, turn VOL clockwise will increase the volume, turn VOL
anti-clockwise will reduce the volume. The LCD displays VOL: XX (XX stands for the
volume level, total 1-36 levels).
Note: Adjust the volume during communication to get suitable level.

9
【FRQ/REP】
【BAND/TONE】
【MENU】
Long press【MENU】for 2 seconds to enter menu list.
KEYPAD FUNCTION
Short press【FRQ】to switch between frequency display mode and channel
display mode.
Offset Direction Function
Long press1. 【FRQ】for 2 seconds to enter offset direction function, LCD
displays "REP";
Press2. 【PUSH】to select offset, turn channel switch to select;
REPOF: Turn off offset direction function;
REP+: Turn on offset direction function, TX frequency>RX frequency;
REP-: Turn on offset direction function, RX frequency>TX frequency;
Press3. 【PUSH】to store and exit.
Band Selection Function
Short press【BAND】to choose band A-B-C-D-E-F-G-H-I.
Echo Function
Long press1. 【BAND】for 2 seconds to enter ECHO function, LCD displays
"ECHO";
Long press2. 【BAND】for 2 seconds to turn off ECHO function.
Frequency control
In frequency mode, press1. 【PUSH】key, then you can adjust frequency for
present channel.
When the frequency is ashing, turn CH clockwise to increase frequency, anti-2.
clockwise to reduce frequency.
When the frequency is flashing, press3. 【PUSH】again to adjust frequency step
size.
【MODE/TSQ】
Modulation Mode
Short press【MODE】to choose mode FM-AM-USB-LSB-PA.

10
【NB/HCUT】
NB function
Short press1. 【NB】to enter NB function, LCD displays "NB";
Short press2. 【NB】again to turn off NB function.
HI-CUT function
Long press1. 【NB】for 2 seconds to enter HI-CUT function, LCD displays "HIC";
Long press2. 【NB】for 2 seconds again to turn off HI-CUT function
【RB/BEEP】
RB function
Short press1. 【RB】to turn on RB function, LCD displays "RB";
Press2. 【PUSH】to select RB frequency, turn on channel switch to select.
OFF~5, total 6 groups.
OFF: Turn off RB function;
Press3. 【PUSH】to store and exit.
BEEP Voice Prompt function
Long press1. 【RB】for 2 seconds to enter BEEP voice prompt function, LCD
displays "RB";
Long press2. 【RB】for 2 seconds again to turn off BEEP voice prompt function.
【DW/+10K】
Dual-Watch function
Short press1. 【DW】to turn on Dual watch, LCD displays "DW";
Short press2. 【DW】again or press PTT to exit DW mode;
Frequency+10KHz function
Long press1. 【DW】for 2 seconds to turn on frequency +10KHz function, LCD
displays "10K";
Long press2. 【DW】for 2 seconds again to turn off frequency +10KHz function.
CTCSS/DCS Function
Long press1. 【MODE】for 2 seconds to enter CTCSS/DCS function, LCD
displays "CTCSS"or "DCS";
Press2. 【PUSH】to set CTCSS/DCS, turn channel switch to select CTCSS/
DCS, then Press【PUSH】to store and exit.
OFF: Turn off CTCSS/DCS function;
CTCSS: 67.0~250.3Hz, Total 38 groups;
DCS: D023N~D754N, Total 104 groups;
Note: This function is available only when install Optional CTCSS board.

11
【SCAN/SKP】
Scan function
Short press1. 【SCAN】to enter scan function, LCD displays "SC";
In scan mode, Turn channel switch will change scan direction.2.
Short press3. 【SCAN】again to exit.
Add/delete scan list function
Long press1. 【SCAN】for 2 seconds to add or delete the current channel from
scan list;
When LCD displays "●", current channel is not added to scan list; When LCD 2.
does not display "●", current channel is added to scan list.
【MEM/STOR】
Using memory channel:
Short press1. 【MEM】to enter memory channel, turn channel switch to choose
memory channel. M1-M6, Total 6 memory channels.
Short press2. 【MEM】again to exit memory channel mode.
Store/Delete memory channel:
Store memory channel1.
When the radio is not in memory channel mode, choose the channel to be
stored, and hold【MEM】enter storage mode, the channel number ashes, Turn
Channel switch to choose the location to be stored (M1-M6), then hold【MEM】
until the ashing channel number disappear, the storage is done.
Delete memory channel2.
In channel mode, hold【MEM】for over 2 seconds, the memory channel
number ashes, turn the CH switch to choose the memory to be deleted. Then
hold【MEM】until the ashing channel number disappear, the delete is done.
【EMG/LOCK】
Choose EMG channel:
Short press【EMG】to use Emergency channel, LCD displays "EMG".
Short press1. 【EMG】once to choose CH9;
Short press2. 【EMG】again to choose CH19;
Short press3. 【EMG】thrice to return to last normal channel.
Keypad Lock Function:
Long press1. 【EMG】to lock keys, LCD displays " ";
Long press2. 【EMG】again to unlock the keys.
Note: When this function is turned on, only PTT button is valid.

12
BACKGROUND FUNCTION MENU OPERATION
Press1. 【MENU】for 2 seconds to enter menu list;
Turn Channel switch to select menu No.1 to No.10;2.
Press3. 【PUSH】to enter the menu setup;
Turn channel switch to select wanted setup;4.
Press any other key or wait 5 seconds, the setting will be stored and exit.5.
No. Function LCD Display Values and Descriptions
1 Mic Gain 1-36, Total 36 levels available;
Default: 30.
2 Monitor Gain 1-32, OFF, Total 33 levels available;
Default: OFF. (Shut NOG function)
3 TOT 1-600s, OFF, Total 10minutes available;
Default: 180S. (Shut TOT function)
4SWR
Protection
OFF: Shut SWR function;
ON: Open SWR function;
Default: ON.
5 Scan Type
SQ: SQ scan function;
TI: Time scan function;
Default: SQ.
6SSB Clarier
switch
OFF: Shut frequency adjustment;
R: Open RX frequency adjustment;
T: Open TX frequency adjustment;
RT: Open TX/RX frequency adjustment;
Default: R.
7
Channel
Frequency
switch
CHAN: Channel adjust;
FREQ: Frequency adjust;
Default: FREQ.
8ASQ Control 01~09: Total 9 Levels;
Default: 05.
9Offset
frequency
Frequency range: 100Hz~5MHz;
Default: 100KHz.
10 Reset
OPT: All function setup resume default;
ALL: All channels and setup resume default;
Default: OPT.

CTCSS code
No. Freq. (Hz) No. Freq. (Hz) No. Freq. (Hz) No. Freq. (Hz)
1 67.0 11 97.4 21 136.5 31 192.8
2 71.9 12 100.0 22 141.3 32 203.5
3 74.4 13 103.5 23 146.2 33 210.7
4 77.0 14 107.2 24 151.4 34 218.1
5 79.7 15 110.9 25 156.7 35 225.7
6 82.5 16 114.8 26 162.2 36 233.6
7 85.4 17 118.8 27 167.9 37 241.8
8 88.5 18 123.0 28 173.8 38 250.3
9 91.5 19 127.3 29 179.9
10 94.8 20 131.8 30 186.2
Code
No.
DSC
(Octal)
Code
No.
DSC
(Octal)
Code
No.
DSC
(Octal)
Code
No.
DSC
(Octal)
1 023 27 152 53 311 79 466
2 025 28 155 54 315 80 503
3 026 29 156 55 325 81 506
4 031 30 162 56 331 82 516
5 032 31 165 57 332 83 523
6 036 32 172 58 343 84 526
7 043 33 174 59 346 85 532
8 047 34 205 60 351 86 546
9 051 35 212 61 356 87 565
10 053 36 223 62 364 88 606
11 054 37 225 63 365 89 612
12 065 38 226 64 371 90 624
13 071 39 243 65 411 91 627
14 072 40 244 66 412 92 631
15 073 41 245 67 413 93 632
16 074 42 246 68 423 94 654
17 114 43 251 69 431 95 662
18 115 44 252 70 432 96 664
19 116 45 255 71 445 97 703
20 122 46 261 72 446 98 712
21 125 47 263 73 452 99 723
22 131 48 265 74 454 100 731
23 132 49 266 75 455 101 732
24 134 50 271 76 462 102 734
25 143 51 274 77 464 103 743
26 145 52 306 78 465 104 754
13
DCS code

13
TRANSMITTER
Power Output AM: 12W / FM: 30W / SSB: 30W(PEP)
Drain 8A(with modulation)
Modulation AM/FM/USB/LSB
Inter-modulation Distortion SSB: 3rd order, more than -25dB; 5th order,
more than -35dB
SSB Carrier Suppression 55dB
Unwanted Sideband 50dB
Frequency Response AM/FM: 300 to 3000Hz
SSB: 450 to 2500Hz
Output Impedance 50ohms, unbalanced
SPECIFICATIONS
GENERAL
Frequency Range 28.000-29.700MHz(Programmable)
Frequency Band A/B/C/D/E/F/G/H/I
Channel 40channels(programmable)in each band
Frequency Control Phase-Locked-Loop Synthesizer
Frequency Step 100Hz、1KHz、10KHz、100KHz、1MHz
Frequency Tolerance
Temperature Range -20℃to +50℃
Microphone with push-to-talk /UP/DN and coiled cord
Input Voltage 13.8V
Dimensions (in mm) 250(W) x 280(L) x 60(H)
Weight 1.5kg
Antenna Connector UHF, SO239
± 5.00 ppm